// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/system_monitor/system_monitor.h"

#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/test/mock_devices_changed_observer.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace base {

namespace {

    class SystemMonitorTest : public testing::Test {
    protected:
        SystemMonitorTest()
        {
            system_monitor_.reset(new SystemMonitor);
        }

        MessageLoop message_loop_;
        std::unique_ptr<SystemMonitor> system_monitor_;

    private:
        DISALLOW_COPY_AND_ASSIGN(SystemMonitorTest);
    };

    TEST_F(SystemMonitorTest, DeviceChangeNotifications)
    {
        const int kObservers = 5;

        testing::Sequence mock_sequencer[kObservers];
        MockDevicesChangedObserver observers[kObservers];
        for (int index = 0; index < kObservers; ++index) {
            system_monitor_->AddDevicesChangedObserver(&observers[index]);

            EXPECT_CALL(observers[index],
                OnDevicesChanged(SystemMonitor::DEVTYPE_UNKNOWN))
                .Times(3)
                .InSequence(mock_sequencer[index]);
        }

        system_monitor_->ProcessDevicesChanged(SystemMonitor::DEVTYPE_UNKNOWN);
        RunLoop().RunUntilIdle();

        system_monitor_->ProcessDevicesChanged(SystemMonitor::DEVTYPE_UNKNOWN);
        system_monitor_->ProcessDevicesChanged(SystemMonitor::DEVTYPE_UNKNOWN);
        RunLoop().RunUntilIdle();
    }

} // namespace

} // namespace base
